secretary napolitano getting grilled on capitol hill today, including this from republican senator chuck grassley of iowa. >> was your department aware of his travels to russia, and if you weren't, the reason? >> the travel in 2012 that you're referring to? um, yes. the system pinged when he was leaving the united states. by the time he returned all investigations -- the matter had been closed. >> is it true that his identity document did not match his airline ticket and if so, why did tsa miss the discrepancy? >> there was a mismatch there. >> well, there was that and there was also more. now with what else we know and what more we still do not. >> tamerlan sar nevada first hi hit the radar in 2011. >> they sent a letter to the fbi and other agencies that we think this guy has become radical. you need to watch him. >> an fbi statement said the question from russia was based on information that he was a follower of radical islam and a strong believer he changed drastically since 2010 as he prepared to leave the united states for travel to join us specified underground groups. the fbi say